Cooking-range.



Patented Man 11,1919.

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COOKING RANGE.

APPLICATION FILED OCT-26,1914.

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CQOKING RANGE. APPLICATION FILED 0cT .26,1914.

Patented Mar. 11,1919.

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GEORGE M. COKE, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO THE FULLER-WARREN COL, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

COOKING-RANGE.

Specification of Letters Patent.

Patented Mar. 11, 1919.

Application filed October 26, 1914. Serial No. 868,570.

To all whom it may concern:

Be it known that I, Gnonen- M. Conn, a citizen of the Uni-ted States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Cooking- Ranges, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

The main objects of this invention are to construct a cooking stove or range for the economical and convenient use of either gas or solid fuel such as coal, coke or wood; to provide for the use of either kind of fuel without interfering with the proper operation or efficiency of the range or stove with the other kind; to facilitate changing from one kind of fuel to the other; and generally to improve the construction and operation of ranges or stoves of this class for using fuel of diflerent kinds.

It consists in the peculiar constructlon, ar-

rangement and combination of parts as hereinafter .particularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts in the several figures. a

Figure 1 is a longitudinal vertical section in a plane indicated by the broken line 1-1, Fig. 2, of a range embodying the invention; Fig. 2 is a horizontal section of the same in a plane indicated by the broken line 22,

Fig. 1; Fig. 3 is a vertical cross section in a plane indicated by the broken line 3 -3, Fig. 1; and Fig. 4 is an inverted plan view of the removable oven plate and gas burner.

Referring to Figs. 1, 2 and 3, the range comprises an oven a, a fire box 6, and anash pit 0 below the fire box at oneside of the oven, and a flue 01, leading from the upper part of the fire box, over, down the opposite side of and underneath the oven.

The range is provided at the back with the usual vertical smoke flue 6,.with which the upper, and lower parts of the oven heating flue d communicate through openings 7 and g, the upper opening 7 being provided with a damper k, as indicated by. dotted lines in Fig. 3, for producing a direct or indirect draft in the usual manner in ranges designed for using solid fuel such as coal, coke or wood.

a. The construction of the range as thus far described, is substantially like that of or dlnary coal ranges except that the top plate i, which is provided over the fire box and ovenwith the usual pot openings and covers (not shown), is extended beyond the oven at the opposite side from the fire box,

and is provided with open-work grids'or grilles j, for gas burners is, which may be constructed and arranged as in ordinary gas ranges. The top oven plate Z is also curved or bent downwardly in conformity with the plate m below the gas burners, to provide for the requisite flue space over the oven, and the range is made of somewhat greater height than is customary in coal ranges, to allow for the downwardly curved or bent upper portion of the flue ol and at the same time provide for an oven of the desired height.

To adapt the range to use gas for heating the oven without encroachment u on the flue d and without reducing the e ciency and convenience of the range when coal or other solid fuel is used, the following changes in and additions to the construction of the range besides those above mentioned, are made: j i

A plate n, provided on the under side with a gas burner 0 and with legs or supparts 39, removably fitted in the oven above and parallel with its bottom on which the legs or supports 29 are adapted to rest, and when placed in position in the oven, forms a combustion chamber 9 in the lower part thereof for the burner, the range being provided on the front side with a wide door 7", having a glazed or mica covered opening 8 opposite the combustion chamber for observing and regulating the operation of the burner.

As shown in Figs. 2 and 4:, at or adjacent to its opposite edges the plate 12 is formed with openings 25, and is cut away at the rear and front edges to afford communigases and products of combustion from the burner escape from the oven into said flue,

thus avoiding their interfering with the proper operation of the burner.

The burner is preferably made of tubular form with jet' openings or orifices n opposite sides thereof, and is disposed obliquely to the plate a, so that the flames produced take openingv at its. upper end which is normally closed by a valve 1). At its lower end this chest or duct communicates through openings. in the back plate of the oven and range with a duct to, which in turn communicates at its upper end through openings in the bottom plate of the oven with the combustion chamber 9 when the plate a is in position. When the burner is placed in position in the ovenv the opening in its rear end is within the air chest or duct u in position to receive air therefrom.

The valve '0 is provided on its under side with an arm or pro ection a: which by en- .gagement with the end of the burner as it is inserted in position, lifts and opens the valve, as shown inFig. 3.

A branch pipe taken off from the pipe 2 which supplies the top burners 70, leads around the end of'the range, as shown in Fig. 2,, and is arovided at itsend with a nippile 2, projecting into the air chest u in position to enter the open end of the burner 0 when it is placed in position, leavinga space around it for the admission of sufli-cient air to produce the proper mixture in the burner.

The pipe 3 is provided with a cock 3-, which is easily accessible from the front of the range and controls the supply of gas to the oven burner- In addition to the air entering the coinbustion chamber 9 through the ducts u, and w, the requisite supply for the operation of the burner is provided by ducts 4, leading upwardly from openingsv in the bottom plate of the range through the ash pit c and openings in the adjacent oven wall into the combustion chamber g. The openings at the upper ends of these ducts are provided with valves 5., which normally closethem, these valves as well as the valve o, beingself-closing, or closing by gravity when they are released,

The. valves 5 are formed or provided with arms or. projections 6., which extend through the openings in; the oven wall, and by engagement withinclines 7 on the. under side of the plate a, open the valves when the plate is inserted in the oven, as shown in Figs. 1 and 2.

As shown in Figs. 1, 2 and 3, the range is in condition for using gas to heat the oven.

In the operation of the oven with the gas burner, air supplied through the chest or duct'u to the rear open end of the burner, mingles with the gas supplied through the nipple 2, to produce the requisite mixture. The auxiliary or secondary supply of air required to produce proper combustion of the gas as it issues from the jet orifices of the burner into the chamber g, is supplied through the air chest to and duct to at the back of the oven, and through the ducts 4 at one side of the oven. The hot waste gases produced by the burner, mingled with the air supplied to and heated in the combustion chamber 9, pass upwardly through the openings t at the sides, and the openings at the rear and front edges of the plate a into the oven a above the plate, and the products of combustion escape from the oven through the vent openings 8 into the flue d, by which they are conducted into the smoke fine 6.

The burner is. lighted by opening the oven door 1" and applying a match or lighter to its frontend. It is regulated by means of the cock 3, while its operation is observed through the openingv e.

To change the range for heating the oven with coal or other solid fuel inthe fire box I), all that is required is to open the oven door 1*, and withdraw the plate n, the valves 12 and 5 closing automatically and preventing the admission of air into the lower part of the oven and interfering with its proper operation. 7 p

The air chest or duct u and the ducts f being located entirely outside the oven walls, do not encroachupon the flue (Z or in any wise interfere with the proper operation of the range and oven when coalor other solid fuel isuscd in the ordinary manner.

Various changes in the construction and arrangement of parts of the range may be made without affecting its principle or mode of operation and without departure from the'invention as defined in the following claims: I

I claim:

1.. In a cooking range the combination with an oven having an opening the back wall adjacent the bottom, of a self closing valve controlling the admission of air through saidopening into the oven, a gas supply pipeoutside the oven adjacent said opening, a removable plate insertible through the door-way of the oven and fittedin the .ovenjabove andparallel with its bottom and adapted to. form therewith a combustion chamber, and a. burner attached.- to theunder sideof and removable with said plate-and adapted when placed in workingposition in the oven to open said valve and to make operative connection with the gas Supply pipe.

2. In a cooling range the combination with an oven having an opening in the back wall adjacent the bottom, of a gas supply pipe outside the oven adjacent to said opening, a removable plate insertible through the door-way of the oven and fitted in the oven above and parallel with its bottom and adapted to form therewith a combustion chamber in communication with the upper part of the oven, a self-closing valve controlling the admission of air through said opening into the oven, and a burner attached to the under side of and removable with said plate and adapted when inserted in the oven to stand inoperative relation to the gas supply pipe and to open said valve and admit outside air into said combustion chamber and into the burner itself.

3. In a cooking range having an oven, a fire box at one side of the oven, and a flue leading from the fire box over, down one side of and underneath the oven, a plate insertible through the door-way of the oven and fitted in the oven parallel with the bottom thereof and forming therewith a combustion chamber, an air chest opening into the oven and having an air inlet opening, avalve for closing said inlet opening, a burner attached to and removable with said plate and adapted when placed in working position to open said valve and receive air from said chest, and a gas supply pipe with which the burner is brought into operative relation when it is placed in working position in the oven.

4. In a cooking range the combination with an oven, a fire pot at. one sideof the oven and a flue leading from the fire box over, down one side of and underneath the oven, of a plate insertible through the doorway of the oven and fitted in the oven parallel with the bottom thereof and forming therewith a combustion chamber, an air chest communicating with the oven below saidplate and having an air inlet opening, a valve for closing said opening, a gas supply pipe having a nipple projecting into the air chest opposite an opening in the oven wall, and a burner attached to the under side of and removable with said plate and adapted when placed in position in the oven to pass at its open intake end through said oven wall opening into said chest in operative relation to said nipple, air being supplied from said chest to the burner and the combustion chamber outside of the burner.

5. In a cooking range the combination with the oven, of an air chest having an air inlet and communicating with the oven through an opening in the intervening wall,

7 a valve for closing the air inlet of said chest,

a removable plate insertible through the door-way of the oven and fitted in the oven and forming a combustion chamber in the lower part thereof, a gas burner attached to and removable with said plate and adapted when placed in position to project through the opening in the oven wall into said chest and to open said valve, and a gas supply pipe leading into said chest and adapted to loosely connect with the burner when it is placed in operative position in the oven.

6. In a cooking range the combination with the oven, a fire box at one side thereof, an ash pit below the fire box, and a flue leading from the fire box over, down one side of and underneath the oven, of an air supply duct leading upwardly through the ash pit into the lower part of the oven at one side thereof and provided with a self closing valve, an air chest at the back of the range communicating with the oven and having an intake opening provided with a self-closing valve, a plate removably fitted in the oven above the openings into it from said duct and chest and provided on the under side with a gas burner, which communicates at one end when in working position, with said air chest, the oven communicating with said flue above said plate through a vent opening and said plate and burner being adaptedwhen inserted into place in the oven to open said valves, and a gas supply pipe leading into said air chest and adapted to loosely connect with the burner when it is placed in working position.

In witness whereof I hereto afiix my signature in presence of two witnesses.

GEORGE M. COKE.

Witnesses:

CHAS. L. Goes, ALICE E. Goss.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of latents, Washington, D. G. 

